Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Share

The calculation of basic and diluted net income per share is as follows:

	Three months ended September 30,				Nine months ended September 30,
	2015		2014		2015		2014
	(In thousands, except per share data)
Net income	$	8,036	$	7,300	$	23,105	$	21,282
Weighted-average shares outstanding — basic	35,806		35,994		35,983		35,634
Dilutive effect of employee stock plans	807		838		887		983
Weighted-average shares outstanding — diluted	36,613		36,832		36,870		36,617
Net income per share — basic	$	0.22	$	0.20	$	0.64	$	0.60
Net income per share — diluted	$	0.22	$	0.20	$	0.63	$	0.58
Anti-dilutive weighted-average shares related to stock award plans	478		427		380		364